Machine for handling molding sand



July 29, 1930 w. E. NAYLOR MACHINE FOR HANDLING HOLDING simn Filed Feb. 11, 1927 2 Sheets-Shea? 1 July 29, 1930. w. E. NAYLOR 1,771,966 MACHINE FOR HANDLING- Momma slum Filed Feb. 11,v 1927 2 Sheets-Sheet 2 Patented July 29, .1930 v WALTER E. NAYLomm? CHICAGO; ILLINOIS, ASSIGNOR TO THEB'EA SLE &I'II E R COMPANY; or o IIoA'eo; ILLnvoIs, A CORPORATION or; ILLINOIS j MACHINE, For; HANDLING MOLDING 'sANn Application filed marr 11,1927 ser arNo'. 167,490;

p The present invention relates to rnacliines .for handling lIlOldlllgSflIlCl. F In factories in which molding niELChlllBSQZl' the rotary'projector type are' used,it is de sir-able to provide means for separating the scrap andjthe like from the sand as the sand is being delivered to'the projector, and the primary objectof'the invention ito'provide an improved construction iii-[which a -ma netic separator is disposed'to receive and act. upon the sand as it is discharged by the elevator and being delivered intothe conveyor which feeds the projector! sion hereof.

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Other objects of (her vent-ion willbeap} parent from a consideration 'ofthe following detaileddes'criptionh f The invention consists in the severalngwel features hereinafterset forth and more-particularly defined by 'the clairn's at the conclu- In the drawings Fi gpl-is aside elevation of a portablermolding' machine embodying the invention. Fig. 2is a vertical-sectiolr through the magnetic se 'aarator-and itsco- 25 acting elements; "Fig.3 is ahorizontal section taken on the line of lfijig 2 F 4:- is J a vertical longitudinal --sect1 through the magnetic separator.

The invention lSGXGIIlPllfiGd in connection- "3 with a portable sand'projector ofthe general type which is exemplified in United .Sta'tes Letters Patentgranted to Beardsley and Piper March 7, 1922;No, 1,408,796, and coinprises a wheeled truckfframe' adapted to travel'on tracks inxthe inoldin'groon'i floor.

The frame comprises sides and is provide'd' with wheels 2? andtra'ctionwheels 2l'having toothed peripheries "to" mesh with racks in rails'setintothe mold'ingroom floorg It -The molding machine on the tn ie'keoing prises a 'jib 414 pivoted to swing horiz'ontally on a post 42"carriedby the truck-frame an arm 45 which is pivoted, at 'ell 'on the outer "eiid of jibd so'it ma swing horizontally relatively to said jib a sand projector V 46 on"the"outerf end of amass; 'anelectric motor 47 mounted on said arm and connectedto drivetherotor of the projector ;-a vibratory conveyor chute 48 mounted with jib 44 and into which s'and" is delivered -by* a into the conveyor for vertically extending elevator; mechanisrni for vlbrating the chute mountedto swing with jib 44L andcontained in a housing 49 rand an endless feed belt 45 ,zwhich is'mounted to swing .witharrn 45, receives sand froni'th'e chute 4:8 and dBllVeI'SlltJtO the projector" and is driven by the motor 47. The vibratory chute 48 is. provided with a'screen'or riddle 48 which causes the sand to be distingr'ated,

as the result'of thevibrationto which it is 'subjected'in its p'ass'agethroughthe screen;

The chute and.mechanismfassociated there with maybe subtsantiallyof thefconstructi-on setfiorthzi'n Patent No.1, l08,493 dated March 7, 1922, 130 whichrefe-rence niay-behad-ior a moredetailed' description.

The elevator which peratesf to su pply a stream of; sand from a pile on the floor to the head of the truck, comprisesan endless'chain 56 having aseries of buckets 61' thereon. The

-sand' will be delivered to the elevator; which is centrally disposed, either" by 'a cross-con 'veyor, as exemplified in Patent No.'1-,408-,796';-

or 'byfother suitable means/as {exenipli fied in "an 'ap'plication' for Le'tte'rs Patent filed; by the aforesaid Beardsley and Piper J anuary" 11, 1926, Serial No. 80,447:

on a horizontally extendinglshaft '58fa'nd passes aroundan idler sprocket 159; at the upper end of'a standardfSO. 1 The sprocket 59 is rotatably mounted'on' a shaft 61 whichi's carried by a pair oilever's 61% The latter are fulcrumed on the standard and are -connected to springs 61" to put the chain'56under sufficient tension to keep it taut atall tithes? The elevator isdriven 'frorn a'niotor mounted on the truck-frame,as exemplified in the afore said Patent Nd: 1,4;08,796',1soth'atflthe elevasaid standard, thereiis forme'da discharge V charge side vof the drumis disposed above the receiving end of the conveyor chute 48. The walls of the hood are extended downwardly at the sides of the drum to enclose the sides thereof and to form sides for the hopper. The drum is mounted to rotate around a stationary shaft 72 and its heads 71 areprovided with hubs 73 which are ournalled in bearings 74: and 75. Each of the bearings is separately formed :from the standard 60 and is secured to an angle iron 76 secured to one of the outer faces of the side walls of the hood 60*. One of the hubs 73 of the drum extends beyond its bearing 75 and has secured thereto a sprocket-wheel 77. A shaft 78 is mounted in a bracket 79 which is fixed tothe front face of the standardt6 O, A sprocket wheel 80 is secured to shaft 78 so that it will be driven bythe upwardly travelling reach of the elevator chain. A sprocket 81 is fixed to shaft 78 and is connected to drive the sprocket? 7 by a sprocketchain 82. The bearing 7 at is extended to receive one end of the shaft 7 2, and the latter is locked against rotation by a set screw 83.

Astationary magnet, consisting of a 'support. or core 85 and suitable windings 86, is fixedly securedto the central portion of the stationary shaft 72. Conductors 88 for the windings of the magnet extendthrough the stationary shaft 72 and thence to the terminals of the windings. The magnet is shaped to be eifec'tivefupon the scrap throughout an arc of approximately 180 and is positioned adjacent that portion of the drum with which the descending sand contacts. The lower portion; of the magnet projects a sufficient distance beyond the point of discharge. of,

the sand to release the scrap and discharge the same separately into a chute 89 at the back of the standard. It is to be noted that the sprocket 81 is considerably smaller than the sprocket 77. As a result of this arrangement the periphery of the drum moves at a substantially slower speed than that at which the sand is discharged from'the buckets and against the drum, and consequently the drum does not accelerate the movement of the sand and scrap but retards the same so as to render the magnet eflicient in separating the scrap from thevsand. It is also to be noted that the hood and hopper are arranged so that the buckets discharge theloads of sand directly against the top part of the drum. In practice, it hasbeen found, that by arranging the'various parts so that the sand is discharged in this manner, the separator is rendered more eflicient in operation for the reason that the scrap is impacted against the drum so that it forces its way into direct contact therewith.

In operation, the sand will be discharged from the elevator buckets into the'hood 60* and so that it is projected directly against the; upper part of the drum. The drum, which rotates constantly during the operation of the elevator, will carry the material from the hopper and deflect the sand into the conveyor 48. The scrap or metal, responsive to magnetic influence and within the influence of the magnet in the drum, will adhere to the drum so it will be carried be yond the receiving end'of the conveyor and released overthe chute 89 and thus separated from the sand. i I

The invention exemplifies a molding machine in which a magnetic separator is interposedbetween theelevator and the feeding mechanism-which'feeds the sand to theprojector and by which the metal particles and scrap will be separated from the sand and separately discharged; The drum around the stationary magnet is driven by power derived from the elevator, so that no separate driving mechanism is necessary. The sand is discharged over the vibratory conveyor. The separating mechanism is'simple in construction and may be produced at a low cost.

The invention is notto be understood as restricted to the d etails set forth, since these may be modified within-thescopeof the appended claims, without departing from the spirit and scope of the invention.

Having thus described the invention, What I claim as new and desireto secure by Letters Patent, is: j

1. In a machine of the character described, the combination of a column having'rotary supporting means at theupper end thereof, an upwardly extending endless sand elevator supportedonsaid means and comprising a series of buckets and an endless chain, a hood on the column and adjacent said supporting means-to receive the sand from the elevator, said hood having a discharge outlet at the said outlet, a conveyor under the drum into which the sand will be deflected by the drum, means operated by the chain for'driving the drum, and a stationary magnet inside of the drum formed to hold metallic material on the drum soit will be discharged beyond the conveyor. 7 V i 2. In a machine of the characterdescribed, the combination of a column having rotary an upwardly extending endless sand elevator supported on said meansand comprising a series of buckets and an endless chain, a hood on the column and adjacent the supporting lower endthereof, arotatable drum under supporting means at the upper end thereof,

means to receive the sand from the elevator, said hood having adjustable means at the lower end thereof forming a restricted outlet, a rotatable drum under the outlet, a conveyor under the druminto which the sand will be deflected by the drum, a sprocket operated by the chain for driving the drum, a stationary shaft carried bythe column and around which the drum is rotatable, and a magnet inside of the drum, fixed to the shaft and formed to hold metallic material on the drum so it will be discharged beyond the conveyor.

3. In a machine for handling molding sand, the combination of a supportingstructure, a magnetic separator mounted on said structure and comprisinga rotatable drum, a bucket elevatorfor the sand, said elevator operating to discharge the sand forcibly and in successive loads against the top part of the drum, and mechanism for rotating the drum.

4. In a machine for handling molding sand, the combination of a supporting structure, a magnetic separator mounted on said structure and comprising a rotatable drum,

means for delivering the sand to the top part of the drum, including a series of buckets and an endless chain, and mechanism connected to be driven by the chain for rotating the drum. e

5. In a machine for handling molding sand, the combination of a supporting structure, a magnetic separator mountedon said structure and comprising a rotatable drum, means adapted to be driven for delivering the sand directly and forcibly against the top part of the drum, and means for conjointly driving the sand delivery means and the drum, said driving means being operable to rotate the drum so that the periphery thereof will move at a substantially slower speed than that at which the sand is discharged from the delivery-means.

6. In a machine for handling molding sand, the combination of a supporting structure, a magnetic separator comprising a rotatable drum, an elevator for deliverlng the sand forciblyand in successive loads against 7 the top part of the drum, including a series of buckets and an endless chain, and mechanism connected to be driven by the chain'for rotating the drum, said mechanism being operable during drive of the elevator to rotate the drum so that the periphery thereof will move at a substantially. slower speed than that at which the sandis discharged from the buckets.

Signed at Chicago, Illinois, this 21st day of January, 1927.

WALTER E. NAYLOR. 

